Binary package “buildd” in ubuntu xenial

Daemon for automatically building Debian binary packages from Debian sources

The sbuild suite of programs (buildd and sbuild) are
used to build binary packages from source packages. The wanna-build
database tracks packages which require building; buildd schedules
work from information it gets from the wanna-build database; sbuild
does the actual package building.
.
buildd is a daemon which will build Debian packages automatically
using the wanna-build database to identify which packages need to be
built. Note that the wanna-build database is not packaged, and
requires installing separately.